<template>
	<view class="login-container">
		<uni-icons type="contact-filled" size="100" color="#AFAFAF"></uni-icons>
		<!-- 登录按钮 -->
		<button type="primary" class="btn-login" open-type="getUserInfo" @getuserinfo="getMyInfo">一键登录</button>
		<!-- 登录提示 -->
		<view class="tips-text">登录后尽享更多权益</view>
	</view>
</template>

<script>
  import { mapMutations, mapState } from 'vuex'
	export default {
    
		data() {
			return {
				
			};
		},
    computed: {
      ...mapState('m_user', ['redirectInfo'])
    },
    methods: {
      ...mapMutations('m_user', ['updateUserInfo', 'updateToken', 'updateRedirectInfo']),
      //用户授权后，获取微信用户的基本信息
      getMyInfo(e) {
        if (e.detail.errMsg === 'getUserInfo:fail auth deny') return uni.$showMsg('您取消了登录授权！')
        console.log(e.detail)
        this.updateUserInfo(e.detail.userInfo)
        this.getToken(e.detail)
      },
      async getToken(info) {
        const [err, res] = await uni.login({}).catch(err => err)//发生错误时err不为null，且res为undefined
        console.log(res)//拿到code值
        if (err || res.errMsg !== 'login:ok') return uni.$showError('登录失败！')
        // 准备参数对象
        const query = {
          code: res.code,
          encryptedData: info.encryptedData,
          iv: info.iv,
          rawData: info.rawData,
          signature: info.signature
        }
        // 换取 token
        const { data: loginResult } = await uni.$http.post('/api/public/v1/users/wxlogin', query)
        console.log(loginResult)
        // if (loginResult.meta.status !== 200) return uni.$showMsg('登录失败！')
        // uni.$showMsg('登录成功')
        if (loginResult.meta.status === 400) return this.updateToken('unrealtokenfortest')
        uni.$showMsg('登录成功')
        this.navigateBack()
      },
      navigateBack() {
        // redirectInfo 不为 null，并且导航方式为 switchTab
        if (this.redirectInfo && this.redirectInfo.openType === 'switchTab') {
          // 调用小程序提供的 uni.switchTab() API 进行页面的导航
          uni.switchTab({
            // 要导航到的页面地址
            url: this.redirectInfo.from,
            // 导航成功之后，把 vuex 中的 redirectInfo 对象重置为 null
            complete: () => {
              this.updateRedirectInfo(null)
            }
          })
        }
      }
    }
	}
</script>

<style lang="scss">
.login-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 750rpx;
  background-color: #f8f8f8;
  position: relative;
  overflow: hidden;
  &::after {
    content: ' ';
    display: block;
    width: 100%;
    height: 40px;
    background-color: white;
    position: absolute;
    bottom: 0;
    left: 0;
    border-radius: 100%;
    transform: translateY(50%);
  }
  .btn-login {
    width: 90%;
    border-radius: 100px;
    margin: 15px 0;
    background-color: #C00000;
  }
  .tips-text {
    font-size: 14px;
    color: gray;
  }
}
</style>
